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New experimental results are presented for the solubility of hydrogen in the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([hmim][Tf 2 N]) for temperatures from (293 to 413) K and pressures up to about 10 MPa. The extended Henry's law is applied to correlate the solubility pressures. The solubility of H 2 in [hmim][Tf 2 N] is low and increases toward higher temperatures. For example, at T ≈ 293 K (413 K) and p ≈ 9 MPa, only about 0.106 mol (0.170 mol) of the gas is dissolved in 1 kg of the ionic liquid.
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Kumełan et al. (2006) studied this question.
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